<template>
  <el-container class="home-container">
    <!-- 头部 -->
    <el-header>
      <div>
        <img src="../assets/logo2.png" alt />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggle">|||</div>
        <!-- 侧边栏菜单区 -->
        <el-menu background-color="#323844" 
        text-color="#fff" 
        active-text-color="#4086CA"
        :collapse="isCollapse"
        :collapse-transition="false"
        :router='true'
        :default-active='activePath'
        >
          <!-- 一级菜单 -->
          <el-submenu :index="item.id+''" 
          v-for="item,i in menulist" 
          :key="item.id"
          >
            <!-- 一级菜单的模板区 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/'+subItem.path+''" 
            v-for="subItem in item.children" 
            :key="subItem.id"
            @click="saveNavState('/'+subItem.path+'')"
            >
              <template slot="title">
                 <i class="el-icon-menu"></i>
                 <span>{{subItem.authName}}</span>
              </template>
              
            </el-menu-item>
          </el-submenu>
          
        </el-menu>
      </el-aside>
      <!-- 右侧主体 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  name: "home",
  data(){
    return{
      //左侧菜单数据
      menulist:[],
      iconsObj:{
        '125':"iconfont icon-users",
        '103':"iconfont icon-tijikongjian",
        '101':"iconfont icon-shangpin",
        '102':"iconfont icon-danju",
        '145':"iconfont icon-baobiao"
      },
      isCollapse:false,
      //被激活得链接地址
      activePath:''
    }
  },
  //生命周期函数
  created(){
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    //退出功能
    logout() {
      //销毁token，并退出
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    //获取所有的菜单
    async getMenuList(){
      const {data:res} = await this.$http.get('menus')
      if(res.meta.status!==200) return this.$message.error(res.meta.msg);
      this.menulist = res.data
      // console.log(res);
    },
    //点击按钮切换菜单的折叠与展开
    toggle(){
      return this.isCollapse = !this.isCollapse
    },
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath)
      this.activePath = activePath
    }
  }
};
</script>


<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  color: #fff;
  font-size: 20px;
  img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
  }
  div {
    display: flex;
    align-items: center; //div垂直居中
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #323844;
  box-sizing: border-box;
}
.el-main {
  background-color: #e7ecef;
}
.iconfont{
  margin-right: 10px;
}
.toggle-button{
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
  background-color: #4B5567;
}
</style>
